US4592427A - Through tubing progressing cavity pump - Google Patents
Through tubing progressing cavity pump Download PDFInfo
- Publication number
- US4592427A US4592427A US06/622,330 US62233084A US4592427A US 4592427 A US4592427 A US 4592427A US 62233084 A US62233084 A US 62233084A US 4592427 A US4592427 A US 4592427A
- Authority
- US
- United States
- Prior art keywords
- stator
- rotor
- seating member
- tubing
- secured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002250 progressing effect Effects 0.000 title claims abstract description 15
- 210000002445 nipple Anatomy 0.000 claims abstract description 28
- 230000000452 restraining effect Effects 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 11
- 238000010168 coupling process Methods 0.000 abstract description 11
- 238000005859 coupling reaction Methods 0.000 abstract description 11
- 239000002184 metal Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
Definitions
- This invention relates in general to progressing cavity pumps, and in particular to a progressing cavity pump installation in a well through tubing and using sucker rods for driving the pump.
- a progressing cavity pump is a well known pump, frequently called a "Moineau" pump, that has an elastomeric outer element or stator.
- the stator has a double lead helix in its inner surface.
- a metal rotor having a single lead helical exterior inserts within the stator. When the rotor is rotated, it causes fluid to pump through the stator.
- the progressing cavity pump of this invention is lowered through tubing on a string of sucker rods.
- the tubing has a seating member secured to its lower end.
- the stator has a seating member mounted below for reception in the tubing seating member.
- the rotor is secured to a drive rod, which in turn is secured to a string of sucker rods.
- the drive rod is located within a tubular rotor nipple which has a restraining collar located therein.
- the drive rod has flange means spaced apart which will not pass through the restraining collar, allowing the stator to be lowered on the sucker rod. Once seated, the sucker rod and rotor are pulled up a few inches to allow for rod stretch.
- FIG. 1 is a vertical sectional view illustrating a progressing cavity pump constructed in accordance with this invention, shown in the set position in the tubing.
- FIG. 2 is a view of the progressing cavity pump of FIG. 1, shown in an unseated position.
- a string of tubing 11 is shown.
- the tubing 11 will normally be located within casing (not shown) in a well.
- a seating nipple 13 is secured to the lower end of tubing 11.
- Seating nipple 13 is a tubular member having a smooth, cylindrical inner diameter that is less than the inner diameter of the tubing 11.
- Seating nipple 13 is secured by a sleeve 15 to the lower end of tubing 11.
- FIG. 1 A progressing cavity pump 17 is shown in FIG. 1 in the seated position.
- Pump 17 includes a stator 19, which is elastomeric and has undulations 21 in its interior.
- Stator 19 is located within a metal stator housing 23.
- An adapter 25 is secured to the lower end of housing 23.
- Adapter 25 has a lower end of lesser diameter than its upper end and which is secured to a seating member 27.
- Seating member 27 is a metal tube having a bore 29 therethrough for the passage of well fluid.
- Seating member 27 has on its exterior two axially spaced-apart annular cup seals 31 and 33. Seals 31 and 33 have a diameter that is larger than the inner diameter of seating nipple 13 for sealing the seating member 27 therein.
- a torque reactor cup 35 is located above the seals 31 and 33.
- Torque reactor cup 35 is of hard metal and has a frusto-conical exterior for wedging within the upper end of the tubing seating nipple 13. Torque reactor cup 35 serves to prevent rotation of the seating member 27.
- the outer diameters of seals 31 and 33 and torque reactor cup 35 are less than the inner diameter of tubing 11, providing a clearance for the passage of well fluid while the pump 17 is being lowered into the well.
- Nipple 37 is a cylindrical tube with an inner diameter approximately that of the inner diameter of stator housing 23.
- Rotor nipple 37 has a restraining collar 39 mounted at its upper end. Collar 39 is secured by threads and has an axial aperture 41 therethrough.
- a helical metal rotor 43 having a length greater than stator 19 is adapted to be located inside stator 19.
- Rotor 43 and stator 19 are of conventional design.
- the upper end of rotor 43 is secured to a drive rod 45.
- Drive rod 45 extends loosely through the aperture 41, providing a clearance for well fluid to be pumped through aperture 41.
- Drive rod 45 has a lower coupling 47 which connects the drive rod 45 to the rotor 43.
- An upper coupling 49, located above collar 39 connects the drive rod 45 to a string of sucker rods 53.
- the couplings 47 and 49 are larger in diameter than aperture 41 and are spaced axially apart about 10 to 15 inches. The spacing is greater than the expected amount that the sucker rods 53 will stretch when the tubing 11 is full of well fluid.
- the sucker rod string 53 comprises rigid rods connected together in customary lengths and extending to the surface.
- the seating nipple 13 will be secured to the lower end of the lowermost section of tubing 11. Then the tubing will be lowered into the well. After the tubing 11 is positioned, pump 17 is lowered into the tubing 11. Pump 17 is assembled with the seating member 27 mounted below the stator housing 23 and the drive rod 45 connected to the lowermost section of sucker rod 53. Pump 17 is lowered through the tubing 11 into the well with the sucker rod 53 supporting the pump 17, which is retained by collar 39 and coupling 47 contacting each other. The torque reactor cup 35 and seals 31 and 33 provide a clearance for fluid to be displaced as the pump 17 is lowered through the fluid in the well.
- the string of rods 53 is picked up a short distance while housing 23 remains stationary and seated, to initially space the top of rotor 43 several inches above the stator 19.
- the upper end of the string 53 is then secured to a conventional rotary power source (not shown) for rotation.
- the string 53 When it becomes necessary to pull the pump 17 for maintenance, the string 53 is uncoupled from the motor at the surface. Then the string 53 is picked up to cause the lower coupling 47 to impact against the collar 39. The upward force should dislodge the seals 31 and 33 and the reactor cup 35 from the seating nipple 13. It may be necessary to place jars in the rod string 53 at the surface to deliver successive impacts to collar 39 to release the pump 17. Once released, the rod string is pulled to the surface, bringing along with it the pump 17. The tubing 11 and seating nipple 13 remain in the well.
- the seating nipple 13 serves as an outer seating member, and the seating member 27 serves as an inner seating member.
- Seals 31 and 33 and reactor cup 35 serve as means for preventing rotation of the stator 19 and for sealing the seating member 27 in the seating nipple 13.
- the couplings 47 and 49 serve as flange means on the drive rod 45 for contacting the restraining member or collar 39.
- the couplings 47 and 49 and the collar 39 serve as engaging means for allowing vertical movement of drive rod 45 with respect to stator 19.
- the invention has significant advantages.
- the invention allows the entire progressive cavity pump to be pulled to the surface without removing the tubing. This is a considerable savings in expense and equipment.
- the rotor remains in a proper alignment even through the rod string stretches.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/622,330 US4592427A (en) | 1984-06-19 | 1984-06-19 | Through tubing progressing cavity pump |
FR8500694A FR2566059A1 (en) | 1984-06-19 | 1985-01-18 | ADVANCED CAVITY PUMP THROUGH TUBES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/622,330 US4592427A (en) | 1984-06-19 | 1984-06-19 | Through tubing progressing cavity pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US4592427A true US4592427A (en) | 1986-06-03 |
Family
ID=24493785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/622,330 Expired - Lifetime US4592427A (en) | 1984-06-19 | 1984-06-19 | Through tubing progressing cavity pump |
Country Status (2)
Country | Link |
---|---|
US (1) | US4592427A (en) |
FR (1) | FR2566059A1 (en) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4669555A (en) * | 1986-04-28 | 1987-06-02 | Conoco Inc. | Downhole circulation pump |
US4957161A (en) * | 1987-06-30 | 1990-09-18 | Institut Francais Du Petrole | Device for pumping a fluid at the bottom of a well |
US5113937A (en) * | 1989-12-28 | 1992-05-19 | Institut Francais De Petrole | Device for separating a mixture of free gas and liquid at the intake of a pump at the bottom of a drilled well |
US5209294A (en) * | 1991-08-19 | 1993-05-11 | Weber James L | Rotor placer for progressive cavity pump |
US5220829A (en) * | 1990-10-23 | 1993-06-22 | Halliburton Company | Downhole formation pump |
US5527220A (en) * | 1994-03-23 | 1996-06-18 | Halliburton Company | Articulatable joint with multi-faceted ball and socket |
US5529428A (en) * | 1992-10-08 | 1996-06-25 | Bischof; Albrecht | Metallic structural element for connecting workpieces consisting of wood, woodworking material or plastic |
US5540281A (en) * | 1995-02-07 | 1996-07-30 | Schlumberger Technology Corporation | Method and apparatus for testing noneruptive wells including a cavity pump and a drill stem test string |
US5549160A (en) * | 1994-05-27 | 1996-08-27 | National-Oilwell Canada Ltd. | Downhole progressing cavity pump rotor valve |
US5954483A (en) * | 1996-11-21 | 1999-09-21 | Baker Hughes Incorporated | Guide member details for a through-tubing retrievable well pump |
WO2003001028A1 (en) * | 2001-06-25 | 2003-01-03 | Weatherford/Lamb, Inc. | Progressive cavity wellbore pump for use in artificial lift systems |
US6729391B2 (en) | 2001-12-14 | 2004-05-04 | Kudu Industries Inc. | Insertable progressing cavity pump |
US20040151608A1 (en) * | 2002-08-01 | 2004-08-05 | Vogt Gregory A. | High torque rotatable progressive cavity drive rods and connectors |
US20050263289A1 (en) * | 2004-05-27 | 2005-12-01 | Kanady Edward C | Method and apparatus for aligning rotor in stator of a rod driven well pump |
US20070277288A1 (en) * | 2006-05-30 | 2007-12-06 | Albert Sing | Scrub glove |
US20090078426A1 (en) * | 2007-09-26 | 2009-03-26 | National Oilwell Varco, L.P. | Insertable Progressive Cavity Pump |
US20090301705A1 (en) * | 2008-06-09 | 2009-12-10 | Smith International, Inc. | Universal Pump Holddown System |
WO2010021549A1 (en) * | 2008-08-21 | 2010-02-25 | Agr Subsea As | Outer rotor of a progressing cavity pump having an inner and an outer rotor |
GB2467460A (en) * | 2007-09-26 | 2010-08-04 | Nat Oilwell Varco Lp | Insertable progressive cavity pump |
US20100239446A1 (en) * | 2007-09-20 | 2010-09-23 | Agr Subsea As | progressing cavity pump with several pump sections |
US20100329913A1 (en) * | 2007-09-11 | 2010-12-30 | Agr Subsea As | Progressing cavity pump adapted for pumping of compressible fluids |
US20110058930A1 (en) * | 2009-09-04 | 2011-03-10 | Robbins & Myers Energy Systems L.P. | Motor/pump with spiral wound stator tube |
US20110150687A1 (en) * | 2008-08-21 | 2011-06-23 | Agr Subsea As | Progressive cavity pump with inner and outer rotors |
CN103899282A (en) * | 2007-08-03 | 2014-07-02 | 松树气体有限责任公司 | System and method for controlling liquid removal operations in a gas-producing well |
WO2015018390A3 (en) * | 2013-08-07 | 2015-04-09 | Netzsch Pumpen & Systeme Gmbh | System for pumping liquid media from a bore and method for installing a pump unit designed as a progressive cavity pump in a bore |
US9033058B2 (en) | 2009-06-01 | 2015-05-19 | National Oilwell Varco, L.P. | No-Go tag systems and methods for progressive cavity pumps |
CN106337805A (en) * | 2016-11-02 | 2017-01-18 | 王国良 | Full-bore hollow-core rotor screw pump |
USD777670S1 (en) | 2015-05-04 | 2017-01-31 | Penn United Technologies, Inc. | Stator laminate |
US9803636B2 (en) | 2015-05-04 | 2017-10-31 | Penn United Technologies, Inc. | Stator laminate, stator assembly including the stator laminate, and method of making the stator assembly |
WO2018091009A1 (en) * | 2016-11-21 | 2018-05-24 | Netzsch Pumpen & System Gmbh | Borehole pump, installation procedure and replacement procedure |
CN108223331A (en) * | 2018-01-06 | 2018-06-29 | 西南石油大学 | A kind of rod pumping pump and ground driving screw pump combined type oil pumping system |
US10590929B2 (en) | 2015-05-04 | 2020-03-17 | Penn United Technologies, Inc. | Method of coupling stator/rotor laminates |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2739650A (en) * | 1951-09-19 | 1956-03-27 | Perfect Circle Corp | Pumping apparatus |
US3347169A (en) * | 1966-09-26 | 1967-10-17 | Sargent Industries | Rotary well pump |
DE2645933A1 (en) * | 1976-10-12 | 1978-04-13 | Pumpen Und Maschinenbau Fritz | Eccentric helical rotor type positive displacement pump - has rotor of rubber or plastic on central high tensile steel shaft |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2715943A (en) * | 1954-04-29 | 1955-08-23 | Exxon Research Engineering Co | Tubing thread leak repair tool |
US2917115A (en) * | 1956-08-21 | 1959-12-15 | Gulf Oil Corp | Pump anchor |
GB924644A (en) * | 1959-09-25 | 1963-04-24 | Otis Eng Co | Well tools |
US4407364A (en) * | 1981-01-27 | 1983-10-04 | Otis Engineering Corporation | Landing nipple for pumpdown well completion system |
-
1984
- 1984-06-19 US US06/622,330 patent/US4592427A/en not_active Expired - Lifetime
-
1985
- 1985-01-18 FR FR8500694A patent/FR2566059A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2739650A (en) * | 1951-09-19 | 1956-03-27 | Perfect Circle Corp | Pumping apparatus |
US3347169A (en) * | 1966-09-26 | 1967-10-17 | Sargent Industries | Rotary well pump |
DE2645933A1 (en) * | 1976-10-12 | 1978-04-13 | Pumpen Und Maschinenbau Fritz | Eccentric helical rotor type positive displacement pump - has rotor of rubber or plastic on central high tensile steel shaft |
Cited By (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4669555A (en) * | 1986-04-28 | 1987-06-02 | Conoco Inc. | Downhole circulation pump |
US4957161A (en) * | 1987-06-30 | 1990-09-18 | Institut Francais Du Petrole | Device for pumping a fluid at the bottom of a well |
US5113937A (en) * | 1989-12-28 | 1992-05-19 | Institut Francais De Petrole | Device for separating a mixture of free gas and liquid at the intake of a pump at the bottom of a drilled well |
US5220829A (en) * | 1990-10-23 | 1993-06-22 | Halliburton Company | Downhole formation pump |
US5209294A (en) * | 1991-08-19 | 1993-05-11 | Weber James L | Rotor placer for progressive cavity pump |
US5529428A (en) * | 1992-10-08 | 1996-06-25 | Bischof; Albrecht | Metallic structural element for connecting workpieces consisting of wood, woodworking material or plastic |
US5527220A (en) * | 1994-03-23 | 1996-06-18 | Halliburton Company | Articulatable joint with multi-faceted ball and socket |
US5549160A (en) * | 1994-05-27 | 1996-08-27 | National-Oilwell Canada Ltd. | Downhole progressing cavity pump rotor valve |
US5540281A (en) * | 1995-02-07 | 1996-07-30 | Schlumberger Technology Corporation | Method and apparatus for testing noneruptive wells including a cavity pump and a drill stem test string |
US5954483A (en) * | 1996-11-21 | 1999-09-21 | Baker Hughes Incorporated | Guide member details for a through-tubing retrievable well pump |
US6193474B1 (en) | 1996-11-21 | 2001-02-27 | Baker Hughes Incorporated | Guide member details for a through-tubing retrievable well pump |
US6675902B2 (en) * | 2001-06-25 | 2004-01-13 | Weatherford/Lamb, Inc. | Progressive cavity wellbore pump and method of use in artificial lift systems |
WO2003001028A1 (en) * | 2001-06-25 | 2003-01-03 | Weatherford/Lamb, Inc. | Progressive cavity wellbore pump for use in artificial lift systems |
US6729391B2 (en) | 2001-12-14 | 2004-05-04 | Kudu Industries Inc. | Insertable progressing cavity pump |
US20040151608A1 (en) * | 2002-08-01 | 2004-08-05 | Vogt Gregory A. | High torque rotatable progressive cavity drive rods and connectors |
US20050263289A1 (en) * | 2004-05-27 | 2005-12-01 | Kanady Edward C | Method and apparatus for aligning rotor in stator of a rod driven well pump |
US7201222B2 (en) * | 2004-05-27 | 2007-04-10 | Baker Hughes Incorporated | Method and apparatus for aligning rotor in stator of a rod driven well pump |
US20070277288A1 (en) * | 2006-05-30 | 2007-12-06 | Albert Sing | Scrub glove |
EP2185788A4 (en) * | 2007-08-03 | 2016-01-06 | Joseph A Zupanick | Flow control system having an isolation device for preventing gas interference during downhole liquid removal operations |
CN103899282A (en) * | 2007-08-03 | 2014-07-02 | 松树气体有限责任公司 | System and method for controlling liquid removal operations in a gas-producing well |
US8556603B2 (en) | 2007-09-11 | 2013-10-15 | Agr Subsea As | Progressing cavity pump adapted for pumping of compressible fluids |
US20100329913A1 (en) * | 2007-09-11 | 2010-12-30 | Agr Subsea As | Progressing cavity pump adapted for pumping of compressible fluids |
US20100239446A1 (en) * | 2007-09-20 | 2010-09-23 | Agr Subsea As | progressing cavity pump with several pump sections |
US8388327B2 (en) | 2007-09-20 | 2013-03-05 | Agr Subsea As | Progressing cavity pump with several pump sections |
US7874368B2 (en) | 2007-09-26 | 2011-01-25 | National Oilwell Varco, L.P. | Insertable progressive cavity pump systems and methods of pumping a fluid with same |
GB2467460B (en) * | 2007-09-26 | 2012-02-01 | Nat Oilwell Varco Lp | Insertable progressive cavity pump |
GB2467460A (en) * | 2007-09-26 | 2010-08-04 | Nat Oilwell Varco Lp | Insertable progressive cavity pump |
WO2009042830A2 (en) * | 2007-09-26 | 2009-04-02 | National Oilwell Varco, L.P. | Insertable progressive cavity pump |
US20090078426A1 (en) * | 2007-09-26 | 2009-03-26 | National Oilwell Varco, L.P. | Insertable Progressive Cavity Pump |
WO2009042830A3 (en) * | 2007-09-26 | 2009-06-04 | Nat Oilwell Varco Lp | Insertable progressive cavity pump |
US8191640B2 (en) | 2008-06-09 | 2012-06-05 | Smith International, Inc. | Universal pump holddown system |
US20090301705A1 (en) * | 2008-06-09 | 2009-12-10 | Smith International, Inc. | Universal Pump Holddown System |
US20110150689A1 (en) * | 2008-08-21 | 2011-06-23 | Agr Subsea As | Outer rotor of a progressing cavity pump having an inner and an outer rotor |
NO329714B1 (en) * | 2008-08-21 | 2010-12-06 | Agr Subsea As | External rotor in eccentric screw pump with an inner and an outer rotor |
US8496456B2 (en) | 2008-08-21 | 2013-07-30 | Agr Subsea As | Progressive cavity pump including inner and outer rotors and a wheel gear maintaining an interrelated speed ratio |
US20110150687A1 (en) * | 2008-08-21 | 2011-06-23 | Agr Subsea As | Progressive cavity pump with inner and outer rotors |
US8613608B2 (en) | 2008-08-21 | 2013-12-24 | Agr Subsea As | Progressive cavity pump having an inner rotor, an outer rotor, and transition end piece |
WO2010021549A1 (en) * | 2008-08-21 | 2010-02-25 | Agr Subsea As | Outer rotor of a progressing cavity pump having an inner and an outer rotor |
US9033058B2 (en) | 2009-06-01 | 2015-05-19 | National Oilwell Varco, L.P. | No-Go tag systems and methods for progressive cavity pumps |
US20110058930A1 (en) * | 2009-09-04 | 2011-03-10 | Robbins & Myers Energy Systems L.P. | Motor/pump with spiral wound stator tube |
AU2014305138B2 (en) * | 2013-08-07 | 2017-10-05 | Netzsch Pumpen & Systeme Gmbh | System for pumping liquid media from a bore and method for installing a pump unit designed as a progressive cavity pump in a bore |
CN105392993A (en) * | 2013-08-07 | 2016-03-09 | 耐驰泵及系统有限公司 | System for pumping liquid media from a bore and method for installing a pump unit designed as a progressive cavity pump in a bore |
WO2015018390A3 (en) * | 2013-08-07 | 2015-04-09 | Netzsch Pumpen & Systeme Gmbh | System for pumping liquid media from a bore and method for installing a pump unit designed as a progressive cavity pump in a bore |
RU2657064C2 (en) * | 2013-08-07 | 2018-06-08 | Неч Пумпен Унд Зистеме Гмбх | Liquid media from the well transportation system and the single screw pump in the well installation method |
USD830303S1 (en) | 2015-05-04 | 2018-10-09 | Penn United Technologies, Inc. | Stator laminate |
US9803636B2 (en) | 2015-05-04 | 2017-10-31 | Penn United Technologies, Inc. | Stator laminate, stator assembly including the stator laminate, and method of making the stator assembly |
USD777670S1 (en) | 2015-05-04 | 2017-01-31 | Penn United Technologies, Inc. | Stator laminate |
US10087926B2 (en) | 2015-05-04 | 2018-10-02 | Penn United Technologies, Inc. | Stator |
US10590929B2 (en) | 2015-05-04 | 2020-03-17 | Penn United Technologies, Inc. | Method of coupling stator/rotor laminates |
US10774832B2 (en) | 2015-05-04 | 2020-09-15 | Penn United Technologies, Inc. | Stator |
CN106337805A (en) * | 2016-11-02 | 2017-01-18 | 王国良 | Full-bore hollow-core rotor screw pump |
WO2018091009A1 (en) * | 2016-11-21 | 2018-05-24 | Netzsch Pumpen & System Gmbh | Borehole pump, installation procedure and replacement procedure |
DE102016122286A1 (en) * | 2016-11-21 | 2018-05-24 | Netzsch Pumpen & Systeme Gmbh | Drilling hole pump, method of installing a downhole pump, and method of exchanging a downhole pump |
CN108223331A (en) * | 2018-01-06 | 2018-06-29 | 西南石油大学 | A kind of rod pumping pump and ground driving screw pump combined type oil pumping system |
CN108223331B (en) * | 2018-01-06 | 2023-12-26 | 西南石油大学 | Combined oil pumping system of rod oil pump and ground driving screw pump |
Also Published As
Publication number | Publication date |
---|---|
FR2566059A1 (en) | 1985-12-20 |
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